Prompt libraries worth copying from

LP

Learn Prompting

Learn Prompting

Structured like a course, from the basics to security. More patient than most of the field and better for someone starting from nothing.

AC

Awesome ChatGPT Prompts

Community

The repository that made the role-prompt format popular. Enormous, uneven, and still the fastest place to find a starting point for a familiar task.

LH

LangChain Hub

LangChain

Prompts as versioned artefacts you pull into code, which is the right shape once a prompt is part of a product rather than a conversation.

P

PromptLayer

PromptLayer

Records what was sent and what came back, so a regression has a diff. The unglamorous tool most teams need before they need anything cleverer.

P

promptfoo

Open source

Turns prompts into test cases you can run in CI, which is the only way a prompt library stays honest once more than one person edits it.

PF

Prompt flow

Microsoft

A visual builder for prompt pipelines inside Azure, with evaluation wired in. Worth it if you are already there, heavy if you are not.

H

Humanloop

Humanloop

Evaluation plus human review in one place, aimed at teams where a domain expert has to sign off on the output rather than an engineer.

F

FlowGPT

FlowGPT

A consumer marketplace of shared prompts and characters. Useful for browsing what people actually use; the quality ceiling is set by what is popular rather than what works.

A

Agenta

Open source

Self-hostable prompt management with evaluation, which matters when the prompts touch anything you cannot paste into a vendor dashboard.

L

Latitude

Latitude

Built around catching the cases where the model goes off the rails rather than the average case, which is where the time actually goes.

P

PromptBase

PromptBase

A marketplace where prompts are sold, mostly for image generation. Worth knowing it exists; the free libraries cover most of what is on sale.

P

PromptHero

PromptHero

Search over prompts paired with the images they produced, which is the only review mechanism image prompting has ever had.

GP

Gemini prompting guide

Google

Google own guidance, and the most explicit of the big three about which techniques their model responds to. Read it alongside the model, not instead of it.

SP

Snack Prompt

Snack Prompt

A community library with an upvote mechanic, which at least gives you a weak signal about which prompts survived contact with real use.

AP

Anthropic prompt engineering tutorial

Anthropic

Short and hands-on, structured around the failure modes rather than the features. The fastest of the official courses to work through.

P

PromptPerfect

Jina AI

Rewrites a prompt for you. Occasionally useful as a second opinion, and a bad habit as a first step: you learn less each time it works.

OP

OpenAI prompting guide

OpenAI

The official reference, and the one to check first when a technique you read about elsewhere turns out not to apply to the model you are using.